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Home ‣ Digital Electronics ‣ Interfacing to the Analog World Comments
  • Question

  • ________ ADCs have a fixed value of conversion time that is not dependent on the value of the analog input.


  • Options
  • A. Substandard
  • B. Dual
  • C. Recessive-approximation
  • D. Successive-approximation

  • Correct Answer
  • Successive-approximation 

    • Interfacing to the Analog World problems

    Search Results

    • 1. The output of the circuit in the given figure (a) at point X on figure (b) will be ________.


    • Options
    • A. 1.011 V
    • B. 2.75 V
    • C. ?1.011 V
    • D. ?2.75 V
      • Discuss
    • 2. The number of binary bits at the input of a DAC or the output of an ADC is known as ________.

    • Options
    • A. accuracy
    • B. linearity
    • C. resolution
    • D. monotonicity
      • Discuss
    • 3. The circuit shown below is a(n) ________.


    • Options
    • A. R/2R ladder D/A converter
    • B. four-bit decoder
    • C. binary-weighted-input DAC
    • D. four-bit A/D converter
      • Discuss
    • 4. The main advantage of the tracking A/D converter over the stairstep-ramp A/D converter is that ________.

    • Options
    • A. it does not require a counter
    • B. it uses an up/down counter to indicate the polarity of the input voltage
    • C. it uses an up/down counter to measure both positive and negative voltages
    • D. it is faster
      • Discuss
    • 5. A counter-ramp ADC stops counting when ________.

    • Options
    • A. the input voltage equals the DAC staircase voltage
    • B. the counter reaches a maximum count
    • C. the input voltage equals 5 volts
    • D. the DAC staircase voltage equals 5 volts
      • Discuss
    • 6. A signal ________ is produced by sampling the signal at a rate less than the minimum rate identified by Nyquist.

    • Options
    • A. Nyquist
    • B. sampling frequency
    • C. basis
    • D. alias
      • Discuss
    • 7. The fastest analog-to-digital converter is the ________.

    • Options
    • A. counter ADC
    • B. successive-approximation ADC
    • C. dual slope ADC
    • D. parallel ADC
      • Discuss
    • 8. A binary-weighter resistor DAC is practical only up to a resolution of ________.

    • Options
    • A. 10 bits
    • B. 2 bits
    • C. 8 bits
    • D. 4 bits
      • Discuss
    • 9. The primary disadvantage of the simultaneous A/D converter is ________.

    • Options
    • A. that it requires the input voltage to be applied to the inputs simultaneously
    • B. the long conversion time required
    • C. the large number of output lines required to simultaneously decode the input voltage
    • D. the large number of comparators required to represent a reasonable-sized binary number
      • Discuss
    • 10. When analog inputs from several sources are to be converted, a(n) ________ technique can be used.

    • Options
    • A. demultiplexing
    • B. multiplexing
    • C. R/2R
    • D. comparator
      • Discuss

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